refiner vs skilled worker

refiner and skilled worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
refiner	Yes	No	No	No
skilled worker	Yes	No	No	No

As nouns, skilled worker is a hypernym of refiner; that is, skilled worker is a word with a broader meaning than refiner:

Other hypernyms of refiner include skilled workman, trained worker.

refiner (noun)	skilled worker (noun)
one whose work is to refine a specific thing	a worker who has acquired special skills